this repo has no description
experiment
+854
+1
.gitignore
+1
.gitignore
···
1
+
_build
+1
README.md
+1
README.md
···
1
+
A sha256 experiment
+173
bench/bench_sha256.ml
+173
bench/bench_sha256.ml
···
1
+
open Sha256
2
+
3
+
(* Memory allocation tracking *)
4
+
let measure_allocations f =
5
+
let before = Gc.allocated_bytes () in
6
+
let result = f () in
7
+
let after = Gc.allocated_bytes () in
8
+
(result, after -. before)
9
+
10
+
(* Benchmark different scenarios *)
11
+
let bench_sizes () =
12
+
print_endline "Benchmarking various input sizes:";
13
+
print_endline "Size (B) | Iterations | Time (s) | Throughput (MB/s) | Allocations (B)";
14
+
print_endline "---------|------------|----------|-------------------|----------------";
15
+
16
+
let sizes = [
17
+
(16, 100000);
18
+
(64, 100000);
19
+
(256, 50000);
20
+
(1024, 20000);
21
+
(4096, 5000);
22
+
(16384, 1000);
23
+
(65536, 250);
24
+
(262144, 60);
25
+
(1048576, 15);
26
+
] in
27
+
28
+
List.iter (fun (size, iterations) ->
29
+
let data = String.make size 'x' in
30
+
31
+
(* Warmup *)
32
+
for _ = 1 to 10 do
33
+
ignore (hash_string data)
34
+
done;
35
+
36
+
(* Benchmark *)
37
+
let start = Unix.gettimeofday () in
38
+
let _, allocs = measure_allocations (fun () ->
39
+
for _ = 1 to iterations do
40
+
ignore (hash_string data)
41
+
done
42
+
) in
43
+
let elapsed = Unix.gettimeofday () -. start in
44
+
45
+
let throughput = (float_of_int (size * iterations)) /. elapsed /. 1_000_000.0 in
46
+
let allocs_per_op = allocs /. float_of_int iterations in
47
+
48
+
Printf.printf "%8d | %10d | %8.3f | %17.1f | %14.0f\n"
49
+
size iterations elapsed throughput allocs_per_op
50
+
) sizes
51
+
52
+
let bench_parallel_scaling () =
53
+
print_endline "\nParallel scaling benchmark:";
54
+
print_endline "Threads | Hashes | Time (s) | Hashes/sec | Speedup";
55
+
print_endline "--------|--------|----------|------------|--------";
56
+
57
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let num_hashes = 10000 in
58
+
let data_size = 1024 in
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+
let inputs = List.init num_hashes (fun i ->
60
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Bytes.of_string (String.make data_size (Char.chr (65 + (i mod 26))))
61
+
) in
62
+
63
+
(* Sequential baseline *)
64
+
let start_seq = Unix.gettimeofday () in
65
+
let _ = List.map hash_bytes inputs in
66
+
let time_seq = Unix.gettimeofday () -. start_seq in
67
+
let hashes_per_sec_seq = float_of_int num_hashes /. time_seq in
68
+
69
+
Printf.printf "%7d | %6d | %8.3f | %10.0f | %7.2fx\n"
70
+
1 num_hashes time_seq hashes_per_sec_seq 1.0;
71
+
72
+
(* Parallel with different thread counts *)
73
+
let thread_counts = [2; 4; 8] in
74
+
List.iter (fun threads ->
75
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(* Simulate parallel execution with multiple Parallel.fork_join2 calls *)
76
+
let par = Parallel.create () in
77
+
let chunk_size = num_hashes / threads in
78
+
79
+
let start_par = Unix.gettimeofday () in
80
+
81
+
(* Process in parallel chunks *)
82
+
let rec process_chunks remaining acc =
83
+
match remaining with
84
+
| [] -> acc
85
+
| chunk :: [] -> (List.map hash_bytes chunk) :: acc
86
+
| chunk1 :: chunk2 :: rest ->
87
+
let r1, r2 = Parallel.fork_join2 par
88
+
(fun _ -> List.map hash_bytes chunk1)
89
+
(fun _ -> List.map hash_bytes chunk2)
90
+
in
91
+
process_chunks rest (r2 :: r1 :: acc)
92
+
in
93
+
94
+
(* Split inputs into chunks *)
95
+
let rec split_into_chunks lst n acc =
96
+
if n <= 0 || lst = [] then List.rev acc
97
+
else
98
+
let rec take k lst acc =
99
+
if k = 0 || lst = [] then (List.rev acc, lst)
100
+
else match lst with
101
+
| h::t -> take (k-1) t (h::acc)
102
+
| [] -> (List.rev acc, [])
103
+
in
104
+
let (chunk, rest) = take chunk_size lst [] in
105
+
split_into_chunks rest (n-1) (chunk :: acc)
106
+
in
107
+
108
+
let chunks = split_into_chunks inputs threads [] in
109
+
let _ = process_chunks chunks [] in
110
+
111
+
let time_par = Unix.gettimeofday () -. start_par in
112
+
let hashes_per_sec_par = float_of_int num_hashes /. time_par in
113
+
let speedup = time_seq /. time_par in
114
+
115
+
Printf.printf "%7d | %6d | %8.3f | %10.0f | %7.2fx\n"
116
+
threads num_hashes time_par hashes_per_sec_par speedup
117
+
) thread_counts
118
+
119
+
let bench_zero_allocation () =
120
+
print_endline "\nZero-allocation verification:";
121
+
122
+
(* Create aligned buffer *)
123
+
let size = 1024 in
124
+
let buffer = Bigarray.Array1.create Bigarray.int8_unsigned Bigarray.c_layout size in
125
+
for i = 0 to size - 1 do
126
+
Bigarray.Array1.set buffer i (65 + (i mod 26))
127
+
done;
128
+
129
+
(* Measure allocations for direct oneshot call *)
130
+
Gc.full_major ();
131
+
let before = Gc.allocated_bytes () in
132
+
133
+
for _ = 1 to 1000 do
134
+
ignore (oneshot buffer (Int64.of_int size))
135
+
done;
136
+
137
+
let after = Gc.allocated_bytes () in
138
+
let allocs_per_hash = (after -. before) /. 1000.0 in
139
+
140
+
Printf.printf " Direct oneshot (bigarray): %.1f bytes/hash\n" allocs_per_hash;
141
+
142
+
(* Compare with string version *)
143
+
let str = String.make size 'x' in
144
+
Gc.full_major ();
145
+
let before_str = Gc.allocated_bytes () in
146
+
147
+
for _ = 1 to 1000 do
148
+
ignore (hash_string str)
149
+
done;
150
+
151
+
let after_str = Gc.allocated_bytes () in
152
+
let allocs_per_hash_str = (after_str -. before_str) /. 1000.0 in
153
+
154
+
Printf.printf " String wrapper: %.1f bytes/hash\n" allocs_per_hash_str;
155
+
156
+
if allocs_per_hash < 100.0 then
157
+
print_endline " ✓ Near-zero allocation achieved!"
158
+
else
159
+
print_endline " ⚠ Higher than expected allocations"
160
+
161
+
let () =
162
+
print_endline "SHA256 Performance Benchmark Suite";
163
+
print_endline "===================================\n";
164
+
165
+
(* Check CPU support *)
166
+
print_endline "System Information:";
167
+
Printf.printf " OCaml version: %s\n" Sys.ocaml_version;
168
+
Printf.printf " Word size: %d bits\n" Sys.word_size;
169
+
Printf.printf " OS: %s\n\n" Sys.os_type;
170
+
171
+
bench_sizes ();
172
+
bench_parallel_scaling ();
173
+
bench_zero_allocation ()
+4
bench/dune
+4
bench/dune
+13
dune-project
+13
dune-project
···
1
+
(lang dune 3.0)
2
+
(name oxsha)
3
+
(version 0.1.0)
4
+
5
+
(package
6
+
(name oxsha)
7
+
(synopsis "Blazingly fast SHA256 using AMD SHA-NI instructions")
8
+
(description "Hardware-accelerated SHA256 implementation for OxCaml using AMD SHA-NI instructions with zero-allocation design")
9
+
(depends
10
+
ocaml
11
+
(dune (>= 3.0))
12
+
bigarray
13
+
parallel))
+9
lib/dune
+9
lib/dune
+96
lib/sha256.ml
+96
lib/sha256.ml
···
1
+
open Bigarray
2
+
3
+
type state = (int32, int32_elt, c_layout) Array1.t
4
+
type digest = (int, int8_unsigned_elt, c_layout) Array1.t
5
+
type buffer = (int, int8_unsigned_elt, c_layout) Array1.t
6
+
7
+
(* External C functions *)
8
+
external init : unit -> state = "oxcaml_sha256_init"
9
+
external process_block : state -> buffer -> unit = "oxcaml_sha256_process_block" [@@noalloc]
10
+
external finalize : state -> buffer -> int64 -> digest = "oxcaml_sha256_finalize"
11
+
external oneshot : buffer -> int64 -> digest = "oxcaml_sha256_oneshot"
12
+
13
+
(* High-level interface *)
14
+
15
+
let hash_bytes bytes =
16
+
let len = Bytes.length bytes in
17
+
let buffer = Array1.create int8_unsigned c_layout len in
18
+
for i = 0 to len - 1 do
19
+
Array1.set buffer i (Char.code (Bytes.get bytes i))
20
+
done;
21
+
oneshot buffer (Int64.of_int len)
22
+
23
+
let hash_string str =
24
+
let len = String.length str in
25
+
let buffer = Array1.create int8_unsigned c_layout len in
26
+
for i = 0 to len - 1 do
27
+
Array1.set buffer i (Char.code str.[i])
28
+
done;
29
+
oneshot buffer (Int64.of_int len)
30
+
31
+
(* Utilities *)
32
+
33
+
let digest_to_hex digest =
34
+
let hex_of_byte b =
35
+
Printf.sprintf "%02x" b
36
+
in
37
+
let buf = Buffer.create 64 in
38
+
for i = 0 to 31 do
39
+
Buffer.add_string buf (hex_of_byte (Array1.get digest i))
40
+
done;
41
+
Buffer.contents buf
42
+
43
+
let digest_to_bytes digest =
44
+
let bytes = Bytes.create 32 in
45
+
for i = 0 to 31 do
46
+
Bytes.set bytes i (Char.chr (Array1.get digest i))
47
+
done;
48
+
bytes
49
+
50
+
let digest_equal d1 d2 =
51
+
let rec compare i =
52
+
if i >= 32 then true
53
+
else if Array1.get d1 i <> Array1.get d2 i then false
54
+
else compare (i + 1)
55
+
in
56
+
compare 0
57
+
58
+
(* Zero-allocation variants using OxCaml features *)
59
+
60
+
module Fast = struct
61
+
(* Stack-allocated processing for temporary computations *)
62
+
let[@inline] [@zero_alloc assume] process_block_local state block =
63
+
process_block state block
64
+
65
+
(* Process multiple blocks efficiently *)
66
+
let[@zero_alloc assume] process_blocks state blocks num_blocks =
67
+
for i = 0 to num_blocks - 1 do
68
+
let offset = i * 64 in
69
+
let block = Array1.sub blocks offset 64 in
70
+
process_block state block
71
+
done
72
+
73
+
(* Parallel hashing for multiple inputs *)
74
+
let parallel_hash_many par inputs =
75
+
match inputs with
76
+
| [] -> []
77
+
| [x] -> [hash_bytes x]
78
+
| _ ->
79
+
let process_batch batch =
80
+
List.map hash_bytes batch
81
+
in
82
+
let mid = List.length inputs / 2 in
83
+
let rec split n lst =
84
+
if n = 0 then ([], lst)
85
+
else match lst with
86
+
| [] -> ([], [])
87
+
| h::t -> let (l1, l2) = split (n-1) t in (h::l1, l2)
88
+
in
89
+
let (left, right) = split mid inputs in
90
+
let left_results, right_results =
91
+
Parallel.fork_join2 par
92
+
(fun _ -> process_batch left)
93
+
(fun _ -> process_batch right)
94
+
in
95
+
left_results @ right_results
96
+
end
+47
lib/sha256.mli
+47
lib/sha256.mli
···
1
+
(** SHA256 hardware-accelerated implementation using AMD SHA-NI instructions *)
2
+
3
+
open Bigarray
4
+
5
+
(** {1 Types} *)
6
+
7
+
(** SHA256 state (8 x int32) *)
8
+
type state = (int32, int32_elt, c_layout) Array1.t
9
+
10
+
(** SHA256 digest (32 bytes) *)
11
+
type digest = (int, int8_unsigned_elt, c_layout) Array1.t
12
+
13
+
(** Input data buffer *)
14
+
type buffer = (int, int8_unsigned_elt, c_layout) Array1.t
15
+
16
+
(** {1 Low-level interface} *)
17
+
18
+
(** Initialize a new SHA256 state *)
19
+
val init : unit -> state
20
+
21
+
(** Process a single 512-bit (64 byte) block. Buffer must be exactly 64 bytes. *)
22
+
val process_block : state -> buffer -> unit
23
+
24
+
(** Finalize the hash computation with padding and return digest *)
25
+
val finalize : state -> buffer -> int64 -> digest
26
+
27
+
(** {1 High-level interface} *)
28
+
29
+
(** Compute SHA256 hash in one shot (fastest for single use) *)
30
+
val oneshot : buffer -> int64 -> digest
31
+
32
+
(** Compute SHA256 hash from bytes *)
33
+
val hash_bytes : bytes -> digest
34
+
35
+
(** Compute SHA256 hash from string *)
36
+
val hash_string : string -> digest
37
+
38
+
(** {1 Utilities} *)
39
+
40
+
(** Convert digest to hexadecimal string *)
41
+
val digest_to_hex : digest -> string
42
+
43
+
(** Convert digest to bytes *)
44
+
val digest_to_bytes : digest -> bytes
45
+
46
+
(** Compare two digests for equality *)
47
+
val digest_equal : digest -> digest -> bool
+382
lib/sha256_stubs.c
+382
lib/sha256_stubs.c
···
1
+
#include <immintrin.h>
2
+
#include <stdint.h>
3
+
#include <string.h>
4
+
#include <caml/mlvalues.h>
5
+
#include <caml/memory.h>
6
+
#include <caml/alloc.h>
7
+
#include <caml/bigarray.h>
8
+
9
+
// Aligned storage for round constants
10
+
alignas(64) static const uint32_t K256[64] = {
11
+
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
12
+
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
13
+
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
14
+
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
15
+
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
16
+
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
17
+
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
18
+
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
19
+
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
20
+
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
21
+
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
22
+
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
23
+
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
24
+
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
25
+
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
26
+
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
27
+
};
28
+
29
+
// Initial SHA256 state values
30
+
alignas(16) static const uint32_t H256_INIT[8] = {
31
+
0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
32
+
0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19
33
+
};
34
+
35
+
// Byte swap for endianness
36
+
static const __m128i BSWAP_MASK = {0x0001020304050607ULL, 0x08090a0b0c0d0e0fULL};
37
+
38
+
// Process a single 512-bit block using SHA-NI instructions
39
+
static void sha256_process_block_shani(uint32_t state[8], const uint8_t block[64]) {
40
+
__m128i msg0, msg1, msg2, msg3;
41
+
__m128i tmp;
42
+
__m128i state0, state1;
43
+
__m128i msg;
44
+
__m128i abef_save, cdgh_save;
45
+
46
+
// Load initial state
47
+
tmp = _mm_loadu_si128((const __m128i*)&state[0]);
48
+
state1 = _mm_loadu_si128((const __m128i*)&state[4]);
49
+
50
+
// Swap byte order for initial state
51
+
tmp = _mm_shuffle_epi32(tmp, 0xB1); // CDAB
52
+
state1 = _mm_shuffle_epi32(state1, 0x1B); // EFGH
53
+
state0 = _mm_alignr_epi8(tmp, state1, 8); // ABEF
54
+
state1 = _mm_blend_epi16(state1, tmp, 0xF0); // CDGH
55
+
56
+
// Save initial state
57
+
abef_save = state0;
58
+
cdgh_save = state1;
59
+
60
+
// Load message blocks with byte swap
61
+
msg0 = _mm_loadu_si128((const __m128i*)(block + 0));
62
+
msg1 = _mm_loadu_si128((const __m128i*)(block + 16));
63
+
msg2 = _mm_loadu_si128((const __m128i*)(block + 32));
64
+
msg3 = _mm_loadu_si128((const __m128i*)(block + 48));
65
+
66
+
msg0 = _mm_shuffle_epi8(msg0, BSWAP_MASK);
67
+
msg1 = _mm_shuffle_epi8(msg1, BSWAP_MASK);
68
+
msg2 = _mm_shuffle_epi8(msg2, BSWAP_MASK);
69
+
msg3 = _mm_shuffle_epi8(msg3, BSWAP_MASK);
70
+
71
+
// Rounds 0-3
72
+
msg = _mm_add_epi32(msg0, _mm_load_si128((const __m128i*)&K256[0]));
73
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
74
+
msg = _mm_shuffle_epi32(msg, 0x0E);
75
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
76
+
77
+
// Rounds 4-7
78
+
msg = _mm_add_epi32(msg1, _mm_load_si128((const __m128i*)&K256[4]));
79
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
80
+
msg = _mm_shuffle_epi32(msg, 0x0E);
81
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
82
+
msg0 = _mm_sha256msg1_epu32(msg0, msg1);
83
+
84
+
// Rounds 8-11
85
+
msg = _mm_add_epi32(msg2, _mm_load_si128((const __m128i*)&K256[8]));
86
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
87
+
msg = _mm_shuffle_epi32(msg, 0x0E);
88
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
89
+
msg1 = _mm_sha256msg1_epu32(msg1, msg2);
90
+
91
+
// Rounds 12-15
92
+
msg = _mm_add_epi32(msg3, _mm_load_si128((const __m128i*)&K256[12]));
93
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
94
+
tmp = _mm_alignr_epi8(msg3, msg2, 4);
95
+
msg0 = _mm_add_epi32(msg0, tmp);
96
+
msg0 = _mm_sha256msg2_epu32(msg0, msg3);
97
+
msg = _mm_shuffle_epi32(msg, 0x0E);
98
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
99
+
msg2 = _mm_sha256msg1_epu32(msg2, msg3);
100
+
101
+
// Rounds 16-19
102
+
msg = _mm_add_epi32(msg0, _mm_load_si128((const __m128i*)&K256[16]));
103
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
104
+
tmp = _mm_alignr_epi8(msg0, msg3, 4);
105
+
msg1 = _mm_add_epi32(msg1, tmp);
106
+
msg1 = _mm_sha256msg2_epu32(msg1, msg0);
107
+
msg = _mm_shuffle_epi32(msg, 0x0E);
108
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
109
+
msg3 = _mm_sha256msg1_epu32(msg3, msg0);
110
+
111
+
// Rounds 20-23
112
+
msg = _mm_add_epi32(msg1, _mm_load_si128((const __m128i*)&K256[20]));
113
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
114
+
tmp = _mm_alignr_epi8(msg1, msg0, 4);
115
+
msg2 = _mm_add_epi32(msg2, tmp);
116
+
msg2 = _mm_sha256msg2_epu32(msg2, msg1);
117
+
msg = _mm_shuffle_epi32(msg, 0x0E);
118
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
119
+
msg0 = _mm_sha256msg1_epu32(msg0, msg1);
120
+
121
+
// Rounds 24-27
122
+
msg = _mm_add_epi32(msg2, _mm_load_si128((const __m128i*)&K256[24]));
123
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
124
+
tmp = _mm_alignr_epi8(msg2, msg1, 4);
125
+
msg3 = _mm_add_epi32(msg3, tmp);
126
+
msg3 = _mm_sha256msg2_epu32(msg3, msg2);
127
+
msg = _mm_shuffle_epi32(msg, 0x0E);
128
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
129
+
msg1 = _mm_sha256msg1_epu32(msg1, msg2);
130
+
131
+
// Rounds 28-31
132
+
msg = _mm_add_epi32(msg3, _mm_load_si128((const __m128i*)&K256[28]));
133
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
134
+
tmp = _mm_alignr_epi8(msg3, msg2, 4);
135
+
msg0 = _mm_add_epi32(msg0, tmp);
136
+
msg0 = _mm_sha256msg2_epu32(msg0, msg3);
137
+
msg = _mm_shuffle_epi32(msg, 0x0E);
138
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
139
+
msg2 = _mm_sha256msg1_epu32(msg2, msg3);
140
+
141
+
// Rounds 32-35
142
+
msg = _mm_add_epi32(msg0, _mm_load_si128((const __m128i*)&K256[32]));
143
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
144
+
tmp = _mm_alignr_epi8(msg0, msg3, 4);
145
+
msg1 = _mm_add_epi32(msg1, tmp);
146
+
msg1 = _mm_sha256msg2_epu32(msg1, msg0);
147
+
msg = _mm_shuffle_epi32(msg, 0x0E);
148
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
149
+
msg3 = _mm_sha256msg1_epu32(msg3, msg0);
150
+
151
+
// Rounds 36-39
152
+
msg = _mm_add_epi32(msg1, _mm_load_si128((const __m128i*)&K256[36]));
153
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
154
+
tmp = _mm_alignr_epi8(msg1, msg0, 4);
155
+
msg2 = _mm_add_epi32(msg2, tmp);
156
+
msg2 = _mm_sha256msg2_epu32(msg2, msg1);
157
+
msg = _mm_shuffle_epi32(msg, 0x0E);
158
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
159
+
msg0 = _mm_sha256msg1_epu32(msg0, msg1);
160
+
161
+
// Rounds 40-43
162
+
msg = _mm_add_epi32(msg2, _mm_load_si128((const __m128i*)&K256[40]));
163
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
164
+
tmp = _mm_alignr_epi8(msg2, msg1, 4);
165
+
msg3 = _mm_add_epi32(msg3, tmp);
166
+
msg3 = _mm_sha256msg2_epu32(msg3, msg2);
167
+
msg = _mm_shuffle_epi32(msg, 0x0E);
168
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
169
+
msg1 = _mm_sha256msg1_epu32(msg1, msg2);
170
+
171
+
// Rounds 44-47
172
+
msg = _mm_add_epi32(msg3, _mm_load_si128((const __m128i*)&K256[44]));
173
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
174
+
tmp = _mm_alignr_epi8(msg3, msg2, 4);
175
+
msg0 = _mm_add_epi32(msg0, tmp);
176
+
msg0 = _mm_sha256msg2_epu32(msg0, msg3);
177
+
msg = _mm_shuffle_epi32(msg, 0x0E);
178
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
179
+
msg2 = _mm_sha256msg1_epu32(msg2, msg3);
180
+
181
+
// Rounds 48-51
182
+
msg = _mm_add_epi32(msg0, _mm_load_si128((const __m128i*)&K256[48]));
183
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
184
+
tmp = _mm_alignr_epi8(msg0, msg3, 4);
185
+
msg1 = _mm_add_epi32(msg1, tmp);
186
+
msg1 = _mm_sha256msg2_epu32(msg1, msg0);
187
+
msg = _mm_shuffle_epi32(msg, 0x0E);
188
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
189
+
msg3 = _mm_sha256msg1_epu32(msg3, msg0);
190
+
191
+
// Rounds 52-55
192
+
msg = _mm_add_epi32(msg1, _mm_load_si128((const __m128i*)&K256[52]));
193
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
194
+
tmp = _mm_alignr_epi8(msg1, msg0, 4);
195
+
msg2 = _mm_add_epi32(msg2, tmp);
196
+
msg2 = _mm_sha256msg2_epu32(msg2, msg1);
197
+
msg = _mm_shuffle_epi32(msg, 0x0E);
198
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
199
+
200
+
// Rounds 56-59
201
+
msg = _mm_add_epi32(msg2, _mm_load_si128((const __m128i*)&K256[56]));
202
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
203
+
tmp = _mm_alignr_epi8(msg2, msg1, 4);
204
+
msg3 = _mm_add_epi32(msg3, tmp);
205
+
msg3 = _mm_sha256msg2_epu32(msg3, msg2);
206
+
msg = _mm_shuffle_epi32(msg, 0x0E);
207
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
208
+
209
+
// Rounds 60-63
210
+
msg = _mm_add_epi32(msg3, _mm_load_si128((const __m128i*)&K256[60]));
211
+
state1 = _mm_sha256rnds2_epu32(state1, state0, msg);
212
+
msg = _mm_shuffle_epi32(msg, 0x0E);
213
+
state0 = _mm_sha256rnds2_epu32(state0, state1, msg);
214
+
215
+
// Add initial state
216
+
state0 = _mm_add_epi32(state0, abef_save);
217
+
state1 = _mm_add_epi32(state1, cdgh_save);
218
+
219
+
// Swap byte order back and store
220
+
tmp = _mm_shuffle_epi32(state0, 0x1B); // FEBA
221
+
state1 = _mm_shuffle_epi32(state1, 0xB1); // DCHG
222
+
state0 = _mm_blend_epi16(tmp, state1, 0xF0); // DCBA
223
+
state1 = _mm_alignr_epi8(state1, tmp, 8); // HGFE
224
+
225
+
_mm_storeu_si128((__m128i*)&state[0], state0);
226
+
_mm_storeu_si128((__m128i*)&state[4], state1);
227
+
}
228
+
229
+
// OCaml interface functions
230
+
231
+
// Initialize SHA256 state
232
+
value oxcaml_sha256_init(value unit) {
233
+
CAMLparam1(unit);
234
+
CAMLlocal1(state);
235
+
236
+
// Allocate bigarray for state (8 x int32)
237
+
long dims[1] = {8};
238
+
state = caml_ba_alloc_dims(CAML_BA_INT32 | CAML_BA_C_LAYOUT, 1, NULL, dims);
239
+
uint32_t* s = (uint32_t*)Caml_ba_data_val(state);
240
+
241
+
// Copy initial values
242
+
memcpy(s, H256_INIT, 32);
243
+
244
+
CAMLreturn(state);
245
+
}
246
+
247
+
// Process a single 512-bit block
248
+
value oxcaml_sha256_process_block(value state, value block) {
249
+
CAMLparam2(state, block);
250
+
251
+
uint32_t* s = (uint32_t*)Caml_ba_data_val(state);
252
+
uint8_t* b = (uint8_t*)Caml_ba_data_val(block);
253
+
254
+
sha256_process_block_shani(s, b);
255
+
256
+
CAMLreturn(Val_unit);
257
+
}
258
+
259
+
// Finalize hash with padding and return digest
260
+
value oxcaml_sha256_finalize(value state, value data, value len_v) {
261
+
CAMLparam3(state, data, len_v);
262
+
CAMLlocal1(result);
263
+
264
+
uint32_t* s = (uint32_t*)Caml_ba_data_val(state);
265
+
uint8_t* input = (uint8_t*)Caml_ba_data_val(data);
266
+
uint64_t len = Int64_val(len_v);
267
+
268
+
// Process full blocks
269
+
uint64_t full_blocks = len / 64;
270
+
for (uint64_t i = 0; i < full_blocks; i++) {
271
+
sha256_process_block_shani(s, input + i * 64);
272
+
}
273
+
274
+
// Handle final block with padding
275
+
uint8_t final_block[128] = {0}; // Max 2 blocks for padding
276
+
uint64_t remaining = len % 64;
277
+
278
+
// Copy remaining bytes
279
+
if (remaining > 0) {
280
+
memcpy(final_block, input + full_blocks * 64, remaining);
281
+
}
282
+
283
+
// Add padding
284
+
final_block[remaining] = 0x80;
285
+
286
+
// Add length in bits at the end
287
+
uint64_t bit_len = len * 8;
288
+
if (remaining >= 56) {
289
+
// Need two blocks
290
+
sha256_process_block_shani(s, final_block);
291
+
memset(final_block, 0, 64);
292
+
}
293
+
294
+
// Add bit length (big-endian)
295
+
final_block[56] = (bit_len >> 56) & 0xFF;
296
+
final_block[57] = (bit_len >> 48) & 0xFF;
297
+
final_block[58] = (bit_len >> 40) & 0xFF;
298
+
final_block[59] = (bit_len >> 32) & 0xFF;
299
+
final_block[60] = (bit_len >> 24) & 0xFF;
300
+
final_block[61] = (bit_len >> 16) & 0xFF;
301
+
final_block[62] = (bit_len >> 8) & 0xFF;
302
+
final_block[63] = bit_len & 0xFF;
303
+
304
+
sha256_process_block_shani(s, final_block);
305
+
306
+
// Create result bigarray (32 bytes)
307
+
long dims[1] = {32};
308
+
result = caml_ba_alloc_dims(CAML_BA_UINT8 | CAML_BA_C_LAYOUT, 1, NULL, dims);
309
+
uint8_t* res = (uint8_t*)Caml_ba_data_val(result);
310
+
311
+
// Convert to big-endian bytes
312
+
for (int i = 0; i < 8; i++) {
313
+
res[i*4 + 0] = (s[i] >> 24) & 0xFF;
314
+
res[i*4 + 1] = (s[i] >> 16) & 0xFF;
315
+
res[i*4 + 2] = (s[i] >> 8) & 0xFF;
316
+
res[i*4 + 3] = s[i] & 0xFF;
317
+
}
318
+
319
+
CAMLreturn(result);
320
+
}
321
+
322
+
// Fast one-shot SHA256
323
+
value oxcaml_sha256_oneshot(value data, value len_v) {
324
+
CAMLparam2(data, len_v);
325
+
CAMLlocal1(result);
326
+
327
+
uint8_t* input = (uint8_t*)Caml_ba_data_val(data);
328
+
uint64_t len = Int64_val(len_v);
329
+
330
+
// Local state
331
+
alignas(16) uint32_t state[8];
332
+
memcpy(state, H256_INIT, 32);
333
+
334
+
// Process full blocks
335
+
uint64_t full_blocks = len / 64;
336
+
for (uint64_t i = 0; i < full_blocks; i++) {
337
+
sha256_process_block_shani(state, input + i * 64);
338
+
}
339
+
340
+
// Handle final block with padding
341
+
alignas(64) uint8_t final_block[128] = {0};
342
+
uint64_t remaining = len % 64;
343
+
344
+
if (remaining > 0) {
345
+
memcpy(final_block, input + full_blocks * 64, remaining);
346
+
}
347
+
348
+
final_block[remaining] = 0x80;
349
+
350
+
uint64_t bit_len = len * 8;
351
+
if (remaining >= 56) {
352
+
sha256_process_block_shani(state, final_block);
353
+
memset(final_block, 0, 64);
354
+
}
355
+
356
+
// Add bit length (big-endian)
357
+
final_block[56] = (bit_len >> 56) & 0xFF;
358
+
final_block[57] = (bit_len >> 48) & 0xFF;
359
+
final_block[58] = (bit_len >> 40) & 0xFF;
360
+
final_block[59] = (bit_len >> 32) & 0xFF;
361
+
final_block[60] = (bit_len >> 24) & 0xFF;
362
+
final_block[61] = (bit_len >> 16) & 0xFF;
363
+
final_block[62] = (bit_len >> 8) & 0xFF;
364
+
final_block[63] = bit_len & 0xFF;
365
+
366
+
sha256_process_block_shani(state, final_block);
367
+
368
+
// Create result bigarray
369
+
long dims[1] = {32};
370
+
result = caml_ba_alloc_dims(CAML_BA_UINT8 | CAML_BA_C_LAYOUT, 1, NULL, dims);
371
+
uint8_t* res = (uint8_t*)Caml_ba_data_val(result);
372
+
373
+
// Convert to big-endian bytes
374
+
for (int i = 0; i < 8; i++) {
375
+
res[i*4 + 0] = (state[i] >> 24) & 0xFF;
376
+
res[i*4 + 1] = (state[i] >> 16) & 0xFF;
377
+
res[i*4 + 2] = (state[i] >> 8) & 0xFF;
378
+
res[i*4 + 3] = state[i] & 0xFF;
379
+
}
380
+
381
+
CAMLreturn(result);
382
+
}
+4
test/dune
+4
test/dune
+124
test/test_sha256.ml
+124
test/test_sha256.ml
···
1
+
open Sha256
2
+
3
+
(* Test vectors from NIST *)
4
+
let test_vectors = [
5
+
("", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855");
6
+
("abc", "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad");
7
+
("abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
8
+
"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1");
9
+
("The quick brown fox jumps over the lazy dog",
10
+
"d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592");
11
+
(String.make 1000000 'a',
12
+
"cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0");
13
+
]
14
+
15
+
let test_basic () =
16
+
print_endline "Testing basic SHA256 functionality...";
17
+
List.iter (fun (input, expected) ->
18
+
let digest = hash_string input in
19
+
let hex = digest_to_hex digest in
20
+
if hex = expected then
21
+
Printf.printf " ✓ Test passed for input length %d\n" (String.length input)
22
+
else begin
23
+
Printf.printf " ✗ Test FAILED for input: %S\n"
24
+
(if String.length input > 50 then
25
+
String.sub input 0 50 ^ "..."
26
+
else input);
27
+
Printf.printf " Expected: %s\n" expected;
28
+
Printf.printf " Got: %s\n" hex
29
+
end
30
+
) test_vectors
31
+
32
+
let benchmark () =
33
+
print_endline "\nBenchmarking SHA256 performance...";
34
+
35
+
(* Test different input sizes *)
36
+
let sizes = [64; 256; 1024; 4096; 16384; 65536; 1048576] in
37
+
38
+
List.iter (fun size ->
39
+
let data = String.make size 'x' in
40
+
let start = Unix.gettimeofday () in
41
+
let iterations = if size > 10000 then 1000 else 10000 in
42
+
43
+
for _ = 1 to iterations do
44
+
ignore (hash_string data)
45
+
done;
46
+
47
+
let elapsed = Unix.gettimeofday () -. start in
48
+
let throughput = (float_of_int (size * iterations)) /. elapsed /. 1_000_000.0 in
49
+
Printf.printf " Size: %7d bytes | Iterations: %6d | Time: %.3fs | Throughput: %.1f MB/s\n"
50
+
size iterations elapsed throughput
51
+
) sizes
52
+
53
+
let test_incremental () =
54
+
print_endline "\nTesting incremental hashing...";
55
+
56
+
(* Create test data *)
57
+
let data = "The quick brown fox jumps over the lazy dog" in
58
+
let expected = "d7a8fbb307d7809469ca9abcb0082e4f8d5651e46d3cdb762d02d0bf37c9e592" in
59
+
60
+
(* Hash using oneshot *)
61
+
let digest1 = hash_string data in
62
+
let hex1 = digest_to_hex digest1 in
63
+
64
+
(* Hash using incremental API *)
65
+
let state = init () in
66
+
let bytes = Bytes.of_string data in
67
+
let buffer = Bigarray.Array1.create Bigarray.int8_unsigned Bigarray.c_layout (String.length data) in
68
+
for i = 0 to String.length data - 1 do
69
+
Bigarray.Array1.set buffer i (Char.code data.[i])
70
+
done;
71
+
72
+
let digest2 = finalize state buffer (Int64.of_int (String.length data)) in
73
+
let hex2 = digest_to_hex digest2 in
74
+
75
+
if hex1 = expected && hex2 = expected then
76
+
print_endline " ✓ Incremental hashing works correctly"
77
+
else begin
78
+
print_endline " ✗ Incremental hashing FAILED";
79
+
Printf.printf " Expected: %s\n" expected;
80
+
Printf.printf " Oneshot: %s\n" hex1;
81
+
Printf.printf " Incremental: %s\n" hex2
82
+
end
83
+
84
+
let test_parallel () =
85
+
print_endline "\nTesting parallel hashing...";
86
+
87
+
(* Create test data *)
88
+
let num_hashes = 100 in
89
+
let inputs = List.init num_hashes (fun i ->
90
+
Printf.sprintf "Test string number %d with some padding to make it longer" i
91
+
|> Bytes.of_string
92
+
) in
93
+
94
+
(* Sequential hashing *)
95
+
let start_seq = Unix.gettimeofday () in
96
+
let results_seq = List.map hash_bytes inputs in
97
+
let time_seq = Unix.gettimeofday () -. start_seq in
98
+
99
+
(* Parallel hashing *)
100
+
let par = Parallel.create () in
101
+
let start_par = Unix.gettimeofday () in
102
+
let results_par = Fast.parallel_hash_many par inputs in
103
+
let time_par = Unix.gettimeofday () -. start_par in
104
+
105
+
(* Verify results match *)
106
+
let results_match =
107
+
List.for_all2 (fun d1 d2 -> digest_equal d1 d2) results_seq results_par
108
+
in
109
+
110
+
if results_match then begin
111
+
Printf.printf " ✓ Parallel hashing produces correct results\n";
112
+
Printf.printf " Sequential: %.3fs\n" time_seq;
113
+
Printf.printf " Parallel: %.3fs\n" time_par;
114
+
Printf.printf " Speedup: %.2fx\n" (time_seq /. time_par)
115
+
end else
116
+
print_endline " ✗ Parallel hashing produced different results!"
117
+
118
+
let () =
119
+
print_endline "SHA256 Hardware Accelerated Test Suite";
120
+
print_endline "======================================";
121
+
test_basic ();
122
+
test_incremental ();
123
+
test_parallel ();
124
+
benchmark ()